Marine propulsion – Jet drive
Patent
1998-11-30
1999-12-21
Swinehart, Ed
Marine propulsion
Jet drive
440 47, B63H 1100
Patent
active
060041730
ABSTRACT:
A jet propulsion system is provided for a water craft in which the secondary flow channel allows water to flow around the impeller region and bypass the impeller blades under certain conditions. The bypass feature provided by the secondary flow channel decreases static inlet pressure and improves the operation of the marine propulsion device at high speeds. In addition, the secondary flow channel increases the total mass flow of water through the steering rudder and therefore improves steering when the propulsion system is being rapidly decelerated, such as during sudden stopping conditions. The secondary flow channel can incorporate one or more individual conduits that bypass the impeller region of the propulsion system or, alternatively, can comprise an annular channel completely surrounding the impeller region.
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Brunswick Corporation
Lanyi William D.
Swinehart Ed
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